feat: Remove unused code

src/paint.rs

@@ -1,5 +1,3 @@
-use std::time::Instant;
-
 use iced::Theme;
 use iced::padding;
 use iced::widget::container;
@@ -18,7 +16,6 @@ pub enum Message {
     MouseReleased(Point),
     MouseMoved(Point),
     Clear,
-    ChangeColor(Color),
     // 内部消息：请求刷新图像
     RefreshImage,
 
@@ -236,9 +233,6 @@ impl Paint {
                 self.pixels.fill(255);
                 self.dirty = true;
             }
-            Message::ChangeColor(c) => {
-                self.color = c;
-            }
             Message::RefreshImage => {
                 if self.dirty {
                     self.update_image_handle();
@@ -269,14 +263,6 @@ impl Paint {
     pub fn update_with_fill_with_color(&mut self, message: Message) {
         match message {
             Message::MousePressed(pos) => {
-                // let start = Instant::now();
-                // let (iter_count, fill_count) = self.fill_scanline(pos);
-                // let elapsed = start.elapsed();
-                // println!(
-                //     "fill_scanline: {:?}, iter_count: {iter_count}, fill_count: {fill_count}, ratio: {}",
-                //     elapsed,
-                //     (iter_count as f32 / fill_count as f32)
-                // );
                 self.fill_scanline(pos);
             }
             _ => {}